SYSTEM OF BIOPOTENTIALS REGISTRATION FOR ELECTROENCEPHALOGRAPHIC RESEARCH

Abstract

The article substantiates the structure of the biopotential registration system for electroencephalographic research. An analysis of the typical designs of similar systems, which are present on the medical equipment market, was carried out and it was established that they hase significant shortcomings associated with the imperfection of the electrodes for recording electroencephalographic signals, the imperfection of the helmet designs for fixing the electrodes, and the difficulty of accurately positioning them on the surface of the patient's head, schematic and technical solutions for the implementation of biopotential registration blocks, etc. The design of the biopotential registration system is proposed, which can be manufactured using 3D printing technologies, and is a monolithic structure having a crab-like shape with central and transverse plates on which spring-loaded electrodes with a special shape of the sensitive surface are placed. At the same time, the electrodes themselves are active and do not require additional wetting or the use of contact gels. The structure of the biopotential registration unit is proposed, which is located in the occipital part of the structure of the proposed biopotential registration system, and is a set of individual amplification and filtering channels of biopotentials on instrumental amplifiers, an analog multiplexer, an analog-to-digital converter and an interface module for data transmission via the BlueTooth channel to a doctor personal computer.